Everything at the Last Supper that Jesus did with his disciples was parable, not reality. Everything he said about washing his disciples' feet and distributing the promised bread and wine in his flesh and blood for the forgiveness of sins was a parable. At the Last Supper, Jesus announced that He would die and rise again, and that the Holy Spirit would come upon the bodies of the saints and teach them His words, but because He spoke in parables, the disciples did not understand. But at the end of the supper he spoke not in parables but in actual words, so that they might understand his will.

[John 16:29~30] Then Jesus' disciples said, "Now you are speaking clearly and without figures of speech. Now we can see that you know all things and that you do not even need to have anyone ask you questions. This makes us believe that you came from God.

Therefore, everything Jesus said and did at the Last Supper was an indication that He would take away the sins of His saints. However, this refers to sins of the heart (soul), not sins of the body.

[Hebrews9:13~14] The blood of goats and bulls and the ashes of a heifer sprinkled on those who are ceremonially unclean sanctify them so that they are outwardly clean.

How much more, then, will the blood of Christ, who through the eternal Spirit offered himself unblemished to God, cleanse our consciences from acts that lead to death, so that we may serve the living God!

It is because of the evil thoughts that come from the heart that a person becomes unclean; therefore, if he does not put away his evil thoughts, he sins. Just as the sins of the flesh are forgiven by the sprinkling of the blood of animals, the sins of the heart are forgiven by the sprinkling of the blood of Jesus, which is not actual blood, but the word of God.

[ Zechariah 13:1] "On that day a fountain will be opened to the house of David and the inhabitants of Jerusalem, to cleanse them from sin and impurity.

The fountain of water for the washing away of sin and uncleanness that the Bible testifies to is a metaphor for the Word of God. The Word of God is taught by the Holy Spirit, and it is only by receiving the Holy Spirit that sin and defilement can be washed away. Therefore, the wine at the Last Supper, which was distributed for the forgiveness of sins, was not a physical representation, but a metaphor for the coming of the Holy Spirit to wash away the sins of the saints.

In the Bible, blood means life, and the substance of life is Jesus. Therefore, when Jesus said, "Unless you drink my blood, you do not have life in you," he was showing that the Spirit of Jesus must come upon the saints to give them life. The Church of God's obsession with physical bread and wine is because they understood the words spoken in parables as actual words.